Circuit-closer.



'No. 706,435. Patentad Aug. 5, I902.

D. F. MULKEY.

CIRCUIT CLOSER.

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UNITED STATES PATENT, OFFICE.-

DAVID F. MULKEY, OF SODDY, TENNESSEE.

CIRCUIT-CLOSER.

SPECIFICATION formingpart of Letters Patent N 0. 706,435, dated August5, 1902.

Application filed December 31,1901. Serial No. 87,868. (No model.)

To aZZ whom it may concern:

Be it known that I, DAVID F. MULKEY, a citizen of the United States, anda resident of Soddy, in the county of Hamilton and State of Tennessee,have invented a new and Improved Circuit-Closer, of which the followingis a full, clear, and exact description.

This invention relates to improvements in circuit-closers particularlyadapted for burglar-alarm systems in banks, hotels, residences, and inall buildings where such alarms are needed; and the object is to providea simple circuit-closer that may be closed by a person stepping upon itor operated by the opening of a door or window.

I will describe a circuit-closer embodying my invention and then pointout the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side view of a circuit-closer embodying myinvention. Fig.2 is a similar view, but showing the device in circuit-closing position.Fig.3 is a section on the line 3 3 of Fig. 1, and Fig. 4 shows thedevice as connectedto a door.

The circuit-closer comprises a frame consisting of side strips 5 6,connected near one end by cross-strips 7 and near the other end bycross-strips 8. One of the side strips, here shown as the strip 5, formsa guide for a block 9, and this block 9 also engages with a guide 10,movable relatively to the guide 5. The guide 10 is held yieldinglytoward the guide 5 by means of a spring 11 at one end and a spring 12near the other end, these springs being connected to the side strip 6and to said movablefguide. The guide-strips are here shown as madeV-shaped at their inner edges, and the block 9 is correspondinglychanneled, the channel, however, at the side in which the guide 10engages being arranged at opposite inclines, as clearly indicated indotted lines in; Fig.1. The guide 10 is movable in different angularrelations to the guide 5--that is, when the block 9 is in its uppermostor outermost position that portion of the guide '10 with which the blockengages will be farther from the guide 5 than at the opposite end, andthis order will be reversed as the block moves toward the opposite endof the frame. the block from accidental movement either to cause theclosing oropening of the circuit.

Attached to the block 9 is a rod 13, with one end of which a lever 14sdesigned to engage. In Figs. 1 and 2 the device is arranged to belocated underneath the door, with the lever 14 above the same anddesigned to be pressed downward by a persons foot. On the opposite endof the rod 13 is a contact consisting of a strip of metal 15. This stripmay carry a series of closing-contacts insulated one from another, sothat several circuits leading to dilferent parts of the build* ing or toany'desired points may be simulta* neously closed. In Fig. 2 I haveshown the device as closing two circuits,in each of which is an alarm.These circuits are represented at 16, in which are a battery 17 and analarm= bell 18, and at 19, in which are abattery 20 and an alarm-bell21. In Fig. 1 are shown devices similar in all respects to those abovedescribed, excepting that the lever 22 is connected by a chain 23 orlike flexible device with a door 24.

In operation the contact will of course be held normally out ofengagement with the circuit, as indicated in Fig. 1. Should the lever beprcssed,.however, the contact will be moved to position to close thecircuit or cir* cuits, as indicated in Fig. 2.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A circuit-closer comprisinga fixed guide, amovable guide, springs engaging near opposite ends thereof whereby itmay move in angular relation to the fixed guide, a block movable alongthe guides, and a contact carried by the block, substantially asspecified.

2. A circuit-closer, comprising a frame, a side member of which formsaguide, a spring pressed guide in the frame, a block movable along saidguides, a rod carried by said block, a contact connected to the rod, andmeans for movingthe rod in one direction, substantially as specified.

3. Acircuit-closer, comprising a frame, one member of which forms aguide, a mov- The object of this is to hold IOO In testimony whereof Ihave signed my name to this specification in the presence of twosubscribing witnesses.

DAVID F. MULKEY.

able guide in the frame, spring connections near opposite ends of saidmovable guide and the frame, a block movable along said guides,

a rod carried by the block, a plurality of con- 5 tacts; carried by therod, and a lever for moving said rod to circuit-closing position,substantially as specified.

Witnesses:-

J. A. OURRIE, J. M. JOHNSON.

